1 files changed, 39 insertions, 0 deletions
diff --git a/src/qt/monitoreddatamapper.cpp b/src/qt/monitoreddatamapper.cpp
new file mode 100644
index 000000000..5931c5387
--- /dev/null
+++ b/src/qt/monitoreddatamapper.cpp
@@ -0,0 +1,39 @@
+// Copyright (c) 2011-2013 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "monitoreddatamapper.h"
+
+#include <QMetaObject>
+#include <QMetaProperty>
+#include <QWidget>
+
+MonitoredDataMapper::MonitoredDataMapper(QObject *parent) :
+    QDataWidgetMapper(parent)
+{
+}
+
+void MonitoredDataMapper::addMapping(QWidget *widget, int section)
+{
+    QDataWidgetMapper::addMapping(widget, section);
+    addChangeMonitor(widget);
+}
+
+void MonitoredDataMapper::addMapping(QWidget *widget, int section, const QByteArray &propertyName)
+{
+    QDataWidgetMapper::addMapping(widget, section, propertyName);
+    addChangeMonitor(widget);
+}
+
+void MonitoredDataMapper::addChangeMonitor(QWidget *widget)
+{
+    // Watch user property of widget for changes, and connect
+    //  the signal to our viewModified signal.
+    QMetaProperty prop = widget->metaObject()->userProperty();
+    int signal = prop.notifySignalIndex();
+    int method = this->metaObject()->indexOfMethod("viewModified()");
+    if(signal != -1 && method != -1)
+    {
+        QMetaObject::connect(widget, signal, this, method);
+    }
+}